Yes you can get driver updates for processors
Sometimes the windows updates will have drivers too, but usually you have to go to the optional hardware options to install the updates.
You SHOULD go to the manufacturer website for video, processor, and M-Audio to get the latest drivers.
It's definitely worth having a second hard drive.
In fact it's MANDITORY!
I have 3 internal drives and 2 firewire external. I actually need to get a few more to implement a better backup system.
re: PS.
yes those are the brand names of products I highly recommend.
CCleaner - Home Defraggler - Defragment your files!